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Question
Tick (√) the correct alternative from the choice given for the following statement.
The most abundant elements in the universe are
Options
neon and argon
hydrogen and helium
aluminium and copper
oxygen and nitrogen
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Solution
hydrogen and helium
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Match the separation of components in List I with the most appropriate process in List II.
| List I | List II |
| 1. Naphthalene from naphthalene & sodium chloride. | A: Separating funnel |
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| 5. Ammonia from an aqueous solution of ammonia. | E: Distillation |
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
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Higher Order Thinking Skills.
In the diagram given below, the circle, square and triangle represent the atoms of different elements.
Identify all combinations that represent
- molecule of a compound
- molecule of an element consisting of two atoms
- molecule of an element consisting of three atoms
Name the two elements which are derived from the country.
